A 47-year-old man developed severe liver inflammation after consuming Reishi mushroom powder while drinking large amounts of vodka over three days. Although Reishi mushrooms are commonly promoted as healthy supplements, in this case the combination with alcohol caused his liver enzymes to spike dangerously high. The patient recovered after hospital treatment, but the case highlights that even natural supplements can be harmful, especially when combined with alcohol. This raises concerns that more research is needed on how mushroom supplements interact with other substances people consume.